PHP core_component::get_all_versions_hash方法代码示例

 /**
  * Load global $CFG;
  * @internal
  * @static
  * @return void
  */
 public static function initialise_cfg() {
     global $DB;
     $dbhash = false;
     try {
         $dbhash = $DB->get_field('config', 'value', array('name'=>'phpunittest'));
     } catch (Exception $e) {
         // not installed yet
         initialise_cfg();
         return;
     }
     if ($dbhash !== core_component::get_all_versions_hash()) {
         // do not set CFG - the only way forward is to drop and reinstall
         return;
     }
     // standard CFG init
     initialise_cfg();
 }

/**
 * Determine if moodle installation requires update.
 *
 * Checks version numbers of main code and all plugins to see
 * if there are any mismatches.
 *
 * @return bool
 */
function moodle_needs_upgrading()
{
    global $CFG;
    if (empty($CFG->version)) {
        return true;
    }
    // There is no need to purge plugininfo caches here because
    // these caches are not used during upgrade and they are purged after
    // every upgrade.
    if (empty($CFG->allversionshash)) {
        return true;
    }
    $hash = core_component::get_all_versions_hash();
    return $hash !== $CFG->allversionshash;
}

/**
 * Upgrade/install other parts of moodle
 * @param bool $verbose
 * @return void, may throw exception
 */
function upgrade_noncore($verbose) {
    global $CFG;

    raise_memory_limit(MEMORY_EXTRA);

    // upgrade all plugins types
    try {
        // Reset caches before any output.
        cache_helper::purge_all(true);
        purge_all_caches();

        $plugintypes = core_component::get_plugin_types();
        foreach ($plugintypes as $type=>$location) {
            upgrade_plugins($type, 'print_upgrade_part_start', 'print_upgrade_part_end', $verbose);
        }
        // Update cache definitions. Involves scanning each plugin for any changes.
        cache_helper::update_definitions();
        // Mark the site as upgraded.
        set_config('allversionshash', core_component::get_all_versions_hash());

        // Purge caches again, just to be sure we arn't holding onto old stuff now.
        cache_helper::purge_all(true);
        purge_all_caches();

    } catch (Exception $ex) {
        upgrade_handle_exception($ex);
    }
}

 /**
  * Stores the version hash in both database and dataroot
  */
 protected static function store_versions_hash()
 {
     global $CFG;
     $framework = self::get_framework();
     $hash = core_component::get_all_versions_hash();
     // add test db flag
     set_config($framework . 'test', $hash);
     // hash all plugin versions - helps with very fast detection of db structure changes
     $hashfile = self::get_dataroot() . '/' . $framework . '/versionshash.txt';
     file_put_contents($hashfile, $hash);
     testing_fix_file_permissions($hashfile);
 }

/**
 * Upgrade/install other parts of moodle
 * @param bool $verbose
 * @return void, may throw exception
 */
function upgrade_noncore($verbose)
{
    global $CFG;
    raise_memory_limit(MEMORY_EXTRA);
    // upgrade all plugins types
    try {
        // Reset caches before any output.
        cache_helper::purge_all(true);
        purge_all_caches();
        $plugintypes = core_component::get_plugin_types();
        foreach ($plugintypes as $type => $location) {
            upgrade_plugins($type, 'print_upgrade_part_start', 'print_upgrade_part_end', $verbose);
        }
        // Upgrade services.
        // This function gives plugins and subsystems a chance to add functions to existing built-in services.
        external_update_services();
        // Update cache definitions. Involves scanning each plugin for any changes.
        cache_helper::update_definitions();
        // Mark the site as upgraded.
        set_config('allversionshash', core_component::get_all_versions_hash());
        // Purge caches again, just to be sure we arn't holding onto old stuff now.
        cache_helper::purge_all(true);
        purge_all_caches();
    } catch (Exception $ex) {
        upgrade_handle_exception($ex);
    } catch (Throwable $ex) {
        // Engine errors in PHP7 throw exceptions of type Throwable (this "catch" will be ignored in PHP5).
        upgrade_handle_exception($ex);
    }
}

 /**
  * Returns whether test database and dataroot were created using the current version codebase
  *
  * @return bool
  */
 public static function is_site_data_updated()
 {
     $datarootpath = util::get_performance_dir();
     if (!is_dir($datarootpath)) {
         return 1;
     }
     if (!file_exists($datarootpath . '/versionshash.txt')) {
         return 1;
     }
     $hash = \core_component::get_all_versions_hash();
     $oldhash = file_get_contents($datarootpath . '/versionshash.txt');
     if ($hash !== $oldhash) {
         return false;
     }
     $dbhash = get_config('core', 'perfromancesitehash');
     if ($hash !== $dbhash) {
         return false;
     }
     return true;
 }